Question

If three angles of a quadrilateral are 45°, 75° and 140°, find the forth angle​

Answer 1

Step-by-step explanation:

45° +75° +140°+x=360

260+x=360

x=360-260

x=100.

Hope it's help(θ‿θ)

Mark♡

Answer 2

Answer:

100°

Step-by-step explanation:

In a quadrilateral, all angles sum up to 360°

So,

Let us assume the fourth angle to be x°.

45° + 75° + 140° + x° = 360°

260° + x° = 360°

x° = 360° - 260°

x° = 100°

Therefore, the answer is 100°